Nailing-machine



J. R. GILDA.

NAILING MACHINE. APPLICATION FILED JAN.I6,1919.

1,373,961 Patented Apr. 5, 1921.

Fig. 1.-

- T Tnm Figlia., L @MJ/gf @MM imlvl@ STATES rarest orifice.

JOHN R. GILDA, OF ST. LOUS, IfISSO'URI.

NALING-IVIACHNE.

intensi.

Specieation of Letters Patent.

Patenten apr. 5, i921.

Application-aies January it,Y 191e. sei-iai ne. 271,425.

To @ZZ who-m t may concern:

Be it lniown that l, JOHN lt. GILDA, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improve-` ment in llailing-Machines, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

This invention relates to nailing machines.

rEhe invention relates particularly to mechanism for straightening warped boards preparatory for the operation of the nailing mechanism, and an object of the inven- Y tion is to provide a simple and efficient mechanism for this purpose.

ln the accompanying drawings illustraty ing a satisfactory embodiment or' the inven` tion,

Figure 1 is a plan view of the mechanism comprising my invention embodied in a nailwarped board and to straighten the board preparatory for operation of the nailing mechanism. Also7 each of the arms 1 is provided with a vertical pin or projection 5. The pins or projections 5 engage the side edges of the horizontal board, the end of which is placed upon the end of the warped hoard preparatory for operation of the nailing mechanism. By the pins or projections 5 the horizontal hoard is properly positioned with the side edges thereof even with the side edges of the warped board shown at A in Fig. 1, while at the saine time the warped board is straightened against the back part of the nailing machine. Y

Each of the anGular levers above described supports a roller 6 at the angle thereof. rlhe rollers 6 extend into the channel between the longitudinal anges of a channel member 7 so that when the rchannel member is moved rearwardly, the levers, which through their connecting rollers 6 are substantially rigid relatively to the channel 7, will also be moved rearwardly. In such rearward movement, the interposed board will be first engaged upon its outer face and at its'opposite side vedges by the hooleendsof the levers and the board then drawn substantially flatwise against the back or support of the nailing machine. Through such action of the levers,`

the; warped hoard will be straightened, and

at the same time the levers, through the pins 5, will properly position the horizontal board thereon. 'y

The operating mechanism for moving'the channel member comprises two-arms 8 "of angular formation as shown in Fig. 1, vhaving their ends connected to the channel memher and having slots 9 through which a roel-:shaft 10 extends. A spring 11 connects each ofsaid arms 8 with a stationary part of the machine so that the angular arms 1 2 are thereby normally heldin the positions shown in Fig. 1, ready for operation to straighten av warped board.

The shaftrl() supports a cam 12 between the arms 8, and said arms 8 support a roller 13 against which the cani operates when the roclr shaft 10 is turnedA in the direction'indicated by the arrow in Fig. 3. The shaft 1() is arranged to be rocked or turned inthe direction of the arrow just priorto the cpe-ration ofthenailing mechanism, so that the arms 8 will be moved and the. angular arms 1 2 will also be moved to straighten the warped hoardjust prior to the opera-tionk of the nailing mechanism at each operationV ofthe machine. As shown, the shaft 10 is one of the usual rock shafts of the machine and is provided with the usual connections i 111 by which saidshaft is rocked or turned in the manner Adescribed before each: opera- Y tion of the nailing mechanism.

ln this particular type of .nailing machine l am enahied to make use of one ofthe usual rock shafts though it will be apparentv that the benefits Vof my invention `areby-no means restricted to use in a machine having such a roel: shaft initially embodied therein. lt-is perfectly apparent that the invention may be used with equal advantage in machines which do not initially containV the rock shaft 10 and that such shaft or its equivalent may be added to the machine not- Y nailing mechanism, so that when the nails are driven they Willgpass properly through the horizontal board placed upon the Warped board and inte the warped board While it is held straight Y by the angular levers 1*2.

vThe nailinnr machine maT be oierated as rapidlyeas it could be operated upon sar-aight:V boards7 and the boxes or parts made by the machine have an appearance' oi perfection Which is not modiiied when they are removed from the machine after the parts have been nailed together. Y f It willY be apparent that the specific construction of the mechanism may be modiiied in various particulars Without departing in theleast from the spiritY and scope or the invention.; I do YVnot confine myself to unessential features, but what l claim and desire'to secure by Letters Patent of the United States, is 1 i l. A nailing machine including, in combination with a support, a bar mounted for movement relatively to the support, a pair of spaced hooked levers mounted on the bar to engage at its opposite side edges the outer face of a Warped board placed therebetween, and means having engagement vvith the rbar for positivelyV pulling the same to cause the levers to 'engage and draw the board substantially fiativise against the support for straightening the board.

2. A nailing machine including, in combination with a support, a pair of spaced levers n arranged to receive a Warped board between them, hooks on said levers arranged to engage the side edges of the board, a roclrshaft, a cam on said shaft, and arms actuated by said cam for moving said levers to straightenv the Warp board against the support.

3. A nailing machine including, in combination With a back support for supporting a Warped board, a pair of levers arranged to engage theside edges of the board, a channel member, rollers on said levers engaging in the channel of said member, arms connected to said channel member for moving the same, a rock shaft, and a cam on said rock shaft for moving said arms to cause said levers to engage and straighten the board against the support.

4t. A nailing machine including, in combination with a back support for supporting a Warpedboard,a pair of levers arranged to engage the side edges of the board, a channel member, rollers on said levers engaging in the channel of said member, arms connected to said channel member for moving the same, a rock shaft, a cam on said rock shaft for moving said arms to cause said levers to engage and straighten the board against the support, and springs on said arms for moving said arms and thereby said levers to their initial positions.

5. 'A nailing machine including, in combination, a back-support for supporting a Warped board, a pair of spaced rigid levers arranged to receive the Warped board between them, hooks on the levers adapted to engage the outer face of the Warped board at its opposite side edges, means for actuating the .levers to engage and press the board toY straight position against the back suppo-rt,

and members carried by the levers for alining a second board relatively to the Warped board when straightened.

6. i nailing machine comprising in combination a pair of levers, a back support for a Warped board, a channel member, rollers on the levers engaging in the channel of the channel member, springs normally holding levers out of position to engage the warped board, and mechanism for operating the levers to engage the Warped'board and press the same to straight position.

7. A. nailing machine comprising, in combination, a baclr support for a Warped board, a pair-o1c levers operable to engage and press the board to straight position against the back support', arms for operating said levers, a rock shaft,a cam on said rock shaft, and a roller supported by said arms in position to be engaged by said cam whereby said levers Will be operated as an ing of said rock shaft.

8. A nailing machine including, in combination; a support for a board, a pair ot spaced levers V"for dran/'ing afwarped: boa-rd against the support for straightening the board, means for actuating the levers, and:

JOHN R. GILDA.

incident to the turn- 

